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P is a point on the hyperbola (x^(2))/(a...

P is a point on the hyperbola `(x^(2))/(a^(2))-(y^(2))/(b^(2))=1`, and N is the foot of the perpendicular from P on the transverse axis. The tangent to the hyperbola at P meets the transverse axis at T. If O is the centre of the hyperbola, then OT.ON is equal to

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